Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / manoj dubey
generally diode is used across the DC contactor coil or
across switch in reverse biased mode. when DC contactor is
deenergised it contains some energy in form of residual
magnetic flux and creates sufficient spark during breaking
the supply. this spark detriorate the switch contact and
switch will get damaged very soon.
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
explain why core loss of a transformer is almost constant under different load conditions when connected across a constant voltage and constant frequency.
i have a 4 Mva transformer 34.5 kv / 480-277 v and i used 2 parallel 3200 amp bus duct for the secondary feeder using 3 ply of bus bar ( 3/8" x 5" ) as a common where the flexible link terminated and 6300 amps breaker for the main, the lower bus duct reaches 70 degrees and the upper bus duct reaches 55 degrees when i used thermal scanner. why the temperature is not balance when the load reaches 3600 amps.
How to calculate Number of Earthing Pits....???
What are steps to be taken while designing of DYN11 distribution transformer to achieve magnetising balance?
What are the material used for resistor?
How is the speed of a DC shunt motor related to the armature current?
what are types of encoder
What is meant by harmonic distortion?
in what type of applications v can use q meter?
How do u analyse protection fault when vcb tripping on load
what is meant by 2 within a star in a voltmeter dial?
What products have you designed which have entered high volume production?
Importance of fault current in power transformers and how to monitor the same? How is it different from winding temperature?
why we use condenser in the thermal power plant, althrough the same vapour will be again heated
why the pf of semiconductor device is improved the electrical devices
